USRE42468E1 - Storage battery charging station - Google Patents

Storage battery charging station Download PDF

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Publication number
USRE42468E1
USRE42468E1 US11/489,733 US48973306A USRE42468E US RE42468 E1 USRE42468 E1 US RE42468E1 US 48973306 A US48973306 A US 48973306A US RE42468 E USRE42468 E US RE42468E
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US
United States
Prior art keywords
air
battery
charger
charging station
electronics
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Expired - Lifetime
Application number
US11/489,733
Inventor
Bernd Heigl
Bernd Ziegler
Rainer Ontl
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Hilti AG
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Hilti AG
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=29724606&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=USRE42468(E1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hilti AG filed Critical Hilti AG
Priority to US11/489,733 priority Critical patent/USRE42468E1/en
Application granted granted Critical
Publication of USRE42468E1 publication Critical patent/USRE42468E1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction

Definitions

  • the invention relates to a charging station for a rechargeable battery that is structurally and electrically compatible with the battery, such as a storage battery module for cordless hand tool machines.
  • a charging station for a rechargeable battery that is structurally and electrically compatible with the battery, such as a storage battery module for cordless hand tool machines.
  • high energy densities can be charged in a brief period using a charging station, whereby the battery heats up significantly.
  • the charger electronics of the charging station also heat up significantly.
  • An important field of application of such high-density energy rechargeable batteries are storage battery modules for cordless hand tool machines such as screwing drills, combination hammers, hand circular saws, etc.
  • EP 1178557 discloses a charging station for a rechargeable storage battery module of cordless band tool machines that can be electrically and structurally connected to the module.
  • the charging station has charging electronics, in a charger housing, with an electrical and structural contact interface for the storage battery module.
  • a blower is arranged in the charger housing.
  • a cooling and heating system is arranged between two air vents downstream of the airflow outlet. An air vent on the airflow outlet side is associated with the structural contact interface of the storage battery module.
  • the object of the invention is to provide a process and a configuration for efficient cooling of the battery and the charging electronics.
  • a charging station for a rechargeable battery that can be connected structurally and electronically with the battery.
  • the charging station has charger electronics in a charger housing with an electrical and physical contact interface for the battery.
  • An air blower for producing an airflow through two air vents is arranged in the charger housing.
  • An air vent is spatially associated with the physical contact interface of the battery and the charger electronics are arranged for heat transfer in the air current.
  • the air vent spatially associated with the physical contact interface of the battery is arranged at the flow inlet side.
  • the air blower is advantageously arranged between the air vent on the flow inlet side and the charger electronics.
  • the charger electronics arranged in the high-pressure path
  • the air vent on the flow inlet side advantageously forms multiple, surface distributed air inlet points, which are spatially associated with cooling vents of the battery, whereby the cooling air mass can be distributed to individual cells within the battery.
  • a pressure chamber with a low flow resistance is provided between the air blower and the air inlet points. This permits uniform distribution of the air volume between separate cells of the battery.
  • the air vent on the flow inlet side is advantageously arranged in the upper part of the charging station, wherein with expedient set-up of the charging station, less dust is picked up in the air current, which is particularly advantageous in polluted work sites.
  • the cooling process of the aforementioned charging station moves a volume of air of an air current produced by an air blower arranged in the charger housing.
  • the air volume with a cooling temperature KT is moved past or into the battery while transferring heat.
  • the air volume with an intermediate temperature IT>CT permeates the charger housing.
  • FIG. 1 shows a charging station with storage battery pack according to the invention.
  • FIG. 1 shows a charging station 1 having a charging electronics 2 in a charger housing 3 that is physically and electrically connected to a rechargeable battery 5 (such as a storage battery module having a plurality of cells 11 ) by an electrical and physical contact interface 4 .
  • An air blower 6 is arranged in the charger housing 3 .
  • the blower 6 produces an air current L through two air vents 7 a, 7 b.
  • the charger electronics 2 are arranged to transfer heat in the air current L.
  • the air vent 7 a on the flow inlet side, arranged in the upper section 13 of the charging station, is spatially associated with the physical contact interface 4 of the battery.
  • the air blower 6 is arranged between the air vent 7 a, on the flow inlet side, and the charging electronics 2 .
  • the air vent 7 a on the flow inlet side has a plurality of surface-distributed air inlet points 8 .
  • Each surface-distributed air inlet point 8 is spatially associated with cooling vents 9 in the module housing 12 of the battery.
  • a pressure chamber 10 having low flow resistance is arranged between the air blower 6 and the air inlet points 8 .
  • the cooling process moves a hypothetical air volume V along an air current L produced by the air blower 6 .
  • the air volume V at a cooling temperature CT [KT] relative to the environment U moves past the battery 5 to transfer heat and them permeates charger housing 3 .
  • Charger housing 3 contains charger electronic that is arranged in air current L to transfer heat at an intermediated temperature IT>KT, before it is released into the environment U at a waste heat temperature WT [AT].

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Portable Power Tools In General (AREA)

Abstract

A charging station (1) for a rechargeable battery (5) that can be electrically and physically connected to the rechargeable battery (5). The charging station (1) has charger electronics (2) in a charger housing (3) and an electrical and physical contact interface (4) for the battery (5). An air blower (6) producing an air current (L) through two air vents (7a, 7b) is arranged in the charger housing (3). The air vent (7a) of the physical contact interface (4) is spatially associated with the battery (5) and the charger electronics (2) is arranged in the air current (L) to transfer heat. In the cooling process, in a first stage, an air volume (V) at cooling temperature CT is moved past the battery to transfer heat into and onto the battery and, in a second stage, the air volume (V) at an intermediate temperature IT>CT permeates the charger housing (2) containing the charging electronics (2.).

Description

BACKGROUND OF THE INVENTION
The invention relates to a charging station for a rechargeable battery that is structurally and electrically compatible with the battery, such as a storage battery module for cordless hand tool machines. In modern rechargeable batteries, high energy densities can be charged in a brief period using a charging station, whereby the battery heats up significantly. In addition, the charger electronics of the charging station also heat up significantly. An important field of application of such high-density energy rechargeable batteries are storage battery modules for cordless hand tool machines such as screwing drills, combination hammers, hand circular saws, etc.
EP 1178557 discloses a charging station for a rechargeable storage battery module of cordless band tool machines that can be electrically and structurally connected to the module. The charging station has charging electronics, in a charger housing, with an electrical and structural contact interface for the storage battery module. A blower is arranged in the charger housing. Optimally, a cooling and heating system is arranged between two air vents downstream of the airflow outlet. An air vent on the airflow outlet side is associated with the structural contact interface of the storage battery module. There is no active cooling of the charger electronics arranged, in the housing corners or in separate housing sections, external to the air flow. The air can, however, be pre-warmed by waste heat from the charger housing, which restricts the airflow before it cools the storage battery module. The warmed air from the storage battery module is discharged into the environment unused.
SUMMARY OF THE INVENTION
The object of the invention is to provide a process and a configuration for efficient cooling of the battery and the charging electronics.
This object is essentially achieved, in accordance with the invention, by a charging station for a rechargeable battery that can be connected structurally and electronically with the battery. The charging station has charger electronics in a charger housing with an electrical and physical contact interface for the battery. An air blower for producing an airflow through two air vents is arranged in the charger housing. An air vent is spatially associated with the physical contact interface of the battery and the charger electronics are arranged for heat transfer in the air current.
The arrangement of the battery and the charger electronics in series, in a common heat-transferring air current, cools efficiently, since the flow rate is involved in the heat transmission along with a constant cooling surface and the temperature difference.
It is also advantageous that the air vent spatially associated with the physical contact interface of the battery is arranged at the flow inlet side. As a result of this arrangement, the air warmed by the battery initially arrives in the charger housing with the air blower, where it cools the charger electronics and is then discharged to the environment.
The air blower is advantageously arranged between the air vent on the flow inlet side and the charger electronics. The charger electronics arranged in the high-pressure path
The air vent on the flow inlet side advantageously forms multiple, surface distributed air inlet points, which are spatially associated with cooling vents of the battery, whereby the cooling air mass can be distributed to individual cells within the battery.
Advantageously, a pressure chamber with a low flow resistance is provided between the air blower and the air inlet points. This permits uniform distribution of the air volume between separate cells of the battery.
The air vent on the flow inlet side is advantageously arranged in the upper part of the charging station, wherein with expedient set-up of the charging station, less dust is picked up in the air current, which is particularly advantageous in polluted work sites.
Essentially, the cooling process of the aforementioned charging station moves a volume of air of an air current produced by an air blower arranged in the charger housing. In an initial process step, the air volume with a cooling temperature KT is moved past or into the battery while transferring heat. In a second process step, the air volume with an intermediate temperature IT>CT permeates the charger housing.
Different cooling heat transfers form for the same air volume due to the temporal sequence of the heat-transferring arrangement of the battery and the charging electronics. The heat transfers depend on the temperature difference. The permissible surface temperature of the charger electronics lies above the temperature of the battery. As a result, an air volume taken from this environment and having a cooling temperature CT [KT], initially cools the battery and then at the intermediate temperature IT [ZT] cools the charging electronics before it is again discharged to the environment at the waste heat temperature WT [AT]. Thus, the overall available streaming air volumes are taken advantage of for efficient cooling.
BRIEF DESCRIPTION OF THE INVENTION
The preferred embodiment of the invention is described below with reference to the drawing, wherein FIG. 1 shows a charging station with storage battery pack according to the invention.
 DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a charging station 1 having a charging electronics 2 in a charger housing 3 that is physically and electrically connected to a rechargeable battery 5 (such as a storage battery module having a plurality of cells 11) by an electrical and physical contact interface 4. An air blower 6 is arranged in the charger housing 3. The blower 6 produces an air current L through two air vents 7a, 7b. The charger electronics 2 are arranged to transfer heat in the air current L.
The air vent 7a, on the flow inlet side, arranged in the upper section 13 of the charging station, is spatially associated with the physical contact interface 4 of the battery. The air blower 6 is arranged between the air vent 7a, on the flow inlet side, and the charging electronics 2. The air vent 7a on the flow inlet side has a plurality of surface-distributed air inlet points 8. Each surface-distributed air inlet point 8 is spatially associated with cooling vents 9 in the module housing 12 of the battery. A pressure chamber 10 having low flow resistance is arranged between the air blower 6 and the air inlet points 8.
The cooling process moves a hypothetical air volume V along an air current L produced by the air blower 6. The air volume V at a cooling temperature CT [KT] relative to the environment U moves past the battery 5 to transfer heat and them permeates charger housing 3. Charger housing 3 contains charger electronic that is arranged in air current L to transfer heat at an intermediated temperature IT>KT, before it is released into the environment U at a waste heat temperature WT [AT].

Claims (7)

1. A charging station for a rechargeable battery (5) that can be physically and electrically connected to the battery (5) having charger electronics (2) in a charger housing (3) and an electrical contact interface (4) for the battery (5) that interfaces a vent (7a), wherein an air blower (6) is arranged in the charger housing (3) for producing an air current (L) through two air vents (7a, 7b), wherein one of the two air vents (7a) faces the battery (5), and wherein the charger electronics (2) is arranged to transfer heat in the air current (L) and wherein the air blower (6) is arranged between the air vent (7a) on a flow inlet side and the charger electronics (2).
2. The charging station of claim 1, wherein the air vent (7a) on a flow inlet side faces the battery (5).
3. The charging station of claim 1, wherein the air vent (7a) on the flow inlet side forms a plurality of surface-distributed air inlet points (8) each associated with cooling vents (9) of the battery (5).
4. The charging station of claim 3, wherein a pressure chamber (10) causing air to be distributed is arranged between the air blower (6) and the air inlet points (8).
5. The charging station of claim 1, wherein the air vent (7a) on the flow inlet side is arranged in an upper section (13) of the charging station (1).
6. A cooling process for a charging station (1) for a rechargeable battery (5) that is electrically and physically connected to the battery (5), wherein an air volume (V) of an air current (L) is moved by an air blower (6) arranged in the charger housing (3) of the charging station (1), comprising, a first step, wherein the air volume (V) at a cooling temperature CT is moved into the battery (5) to transfer heat, and, in a second step, the air volume (V) at an intermediate temperature IT>CT permeates the charger housing (3) containing the charger electronics (2).
7. A charging station for a rechargeable battery (5) that can be physically and electrically connected to the battery (5), comprising a charger housing (3) having an electrical contact interface (4) for physically and electrically connecting the charger housing (3) with the rechargeable battery (5); charger electronics (2) located in the charger housing (3); and an air blower (6) for producing air flow through two air vents (7a, 7b) and located in the charger housing (3), wherein one of the two air vents (7a) faces the battery (5), and the charger electronics (2) is located, in the direction of the air flow, downstream of the battery (5) and upstream of another of the two air vents (7b), whereby an environmental air volume having a cooling temperature flows through the battery for cooling the same and then at an intermediate temperature, permeates the charger housing (3), cooling the charger electronics (2).
US11/489,733 2002-07-12 2006-07-18 Storage battery charging station Expired - Lifetime USRE42468E1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/489,733 USRE42468E1 (en) 2002-07-12 2006-07-18 Storage battery charging station

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP02405600 2002-07-12
EP02405600A EP1381134B1 (en) 2002-07-12 2002-07-12 Battery charging station
US10/616,545 US6967464B2 (en) 2002-07-12 2003-07-09 Storage battery charging station
US11/489,733 USRE42468E1 (en) 2002-07-12 2006-07-18 Storage battery charging station

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10/616,545 Reissue US6967464B2 (en) 2002-07-12 2003-07-09 Storage battery charging station

Publications (1)

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USRE42468E1 true USRE42468E1 (en) 2011-06-21

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US10/616,545 Ceased US6967464B2 (en) 2002-07-12 2003-07-09 Storage battery charging station
US11/489,733 Expired - Lifetime USRE42468E1 (en) 2002-07-12 2006-07-18 Storage battery charging station

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Application Number Title Priority Date Filing Date
US10/616,545 Ceased US6967464B2 (en) 2002-07-12 2003-07-09 Storage battery charging station

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US (2) US6967464B2 (en)
EP (1) EP1381134B1 (en)
JP (1) JP4629962B2 (en)

Cited By (7)

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US20120066916A1 (en) * 2010-09-18 2012-03-22 Georg Heinzelmann Handheld work apparatus
US10827655B2 (en) 2017-06-26 2020-11-03 Milwaukee Electric Tool Corporation Battery charger
US11523510B2 (en) 2018-10-17 2022-12-06 Milwaukee Electric Tool Corporation Battery charger including printed circuit board having an AC portion and a DC portion
US11540429B2 (en) 2018-07-30 2022-12-27 Milwaukee Electric Tool Corporation Battery charger
US11670808B2 (en) 2019-12-03 2023-06-06 Milwaukee Electric Tool Corporation Charger and charger system
US12347839B2 (en) 2021-07-08 2025-07-01 Milwaukee Electric Tool Corporation Power tool system
US12348066B2 (en) 2022-10-21 2025-07-01 Techtronic Cordless Gp Charger with battery pack cooling fan

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EP1475876B1 (en) * 2003-05-03 2011-01-05 Metabowerke GmbH Charger for a battery assembly and arrangement comprising a charger and a battery assembly
JP4687015B2 (en) * 2004-06-23 2011-05-25 トヨタ自動車株式会社 Power supply
US7869576B1 (en) * 2005-04-28 2011-01-11 Techradium, Inc. Power management system for a plurality of at least partially rechargeable vehicles
US8030886B2 (en) * 2005-12-21 2011-10-04 Nuventix, Inc. Thermal management of batteries using synthetic jets
DE102007013072B4 (en) 2006-03-20 2021-10-21 Denso Corporation Multiple power supply device
JP4905852B2 (en) * 2006-09-07 2012-03-28 日立工機株式会社 Charger
TW200830662A (en) * 2007-01-10 2008-07-16 Mobiletron Electronics Co Ltd Battery charger for power tool
DE102007042399B4 (en) * 2007-09-06 2021-02-04 Robert Bosch Gmbh charger
JP5136263B2 (en) * 2008-07-28 2013-02-06 トヨタ自動車株式会社 Power storage device
DE102010064026A1 (en) 2010-12-23 2012-06-28 Hilti Aktiengesellschaft Dust with tempered accumulator
JP6177709B2 (en) 2014-02-26 2017-08-09 株式会社マキタ Charger
JP6443663B2 (en) * 2014-10-31 2018-12-26 工機ホールディングス株式会社 Charger
JP6404139B2 (en) * 2015-02-13 2018-10-10 株式会社マキタ Battery pack
JP6391526B2 (en) * 2015-04-02 2018-09-19 株式会社クボタ Battery pack and electric work vehicle
EP3086434A1 (en) * 2015-04-24 2016-10-26 HILTI Aktiengesellschaft Mains powered battery charger, charging system and handheld machine tool
WO2017083405A1 (en) * 2015-11-09 2017-05-18 Gogoro Inc. Systems and methods for thermal management of portable electrical energy storage devices
US10141758B2 (en) 2016-07-26 2018-11-27 Westhill Innovation, LLC Power card and base
USD805030S1 (en) 2016-08-05 2017-12-12 Westhill Innovation, LLC Charger
CN107846047B (en) * 2016-09-19 2020-03-24 宁波三星智能电气有限公司 Charging pile and heat dissipation control method
CN106877446A (en) * 2017-03-21 2017-06-20 成都锐奕信息技术有限公司 The radiator structure of card form terminal base charger
CN108110154A (en) * 2018-01-12 2018-06-01 浙江动新能源动力科技股份有限公司 A kind of battery pack
CN111819757B (en) * 2018-03-12 2023-08-22 本田技研工业株式会社 Chargers for mobile batteries
WO2021129876A1 (en) * 2019-12-26 2021-07-01 奥动新能源汽车科技有限公司 Method and system for adjusting temperature of battery pack, charging box, switching station or energy storage station
WO2021150156A1 (en) * 2020-01-23 2021-07-29 Husqvarna Ab Battery pack charging system, battery pack charger, and method for charging a battery pack
DE102020126740A1 (en) * 2020-10-12 2022-04-14 Einhell Germany Ag A system and method, formed from at least one charging device and one accumulator, for controlling the temperature of an accumulator
DE102022212288A1 (en) 2022-11-18 2024-05-23 Robert Bosch Gesellschaft mit beschränkter Haftung Charging device for at least one battery pack

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US9138884B2 (en) * 2010-09-18 2015-09-22 Andreas Stihl Ag & Co. Kg Handheld work apparatus
US20120066916A1 (en) * 2010-09-18 2012-03-22 Georg Heinzelmann Handheld work apparatus
US11839066B2 (en) 2017-06-26 2023-12-05 Milwaukee Electric Tool Corporation Battery charger
US10827655B2 (en) 2017-06-26 2020-11-03 Milwaukee Electric Tool Corporation Battery charger
US12262516B2 (en) 2017-06-26 2025-03-25 Milwaukee Electric Tool Corporation Battery pack, charger and disconnect system
US11540429B2 (en) 2018-07-30 2022-12-27 Milwaukee Electric Tool Corporation Battery charger
US11523510B2 (en) 2018-10-17 2022-12-06 Milwaukee Electric Tool Corporation Battery charger including printed circuit board having an AC portion and a DC portion
US11855468B2 (en) 2018-10-17 2023-12-26 Milwaukee Electric Tool Corporation Battery charger including an isolating member
US12212169B2 (en) 2018-10-17 2025-01-28 Milwaukee Electric Tool Corporation Battery charger including an isolating member
US12015130B2 (en) 2019-12-03 2024-06-18 Milwaukee Electric Tool Corporation Charger and charger system
US11670808B2 (en) 2019-12-03 2023-06-06 Milwaukee Electric Tool Corporation Charger and charger system
US12412936B2 (en) 2019-12-03 2025-09-09 Milwaukee Electric Tool Corporation Battery pack and charger system
US12347839B2 (en) 2021-07-08 2025-07-01 Milwaukee Electric Tool Corporation Power tool system
US12348066B2 (en) 2022-10-21 2025-07-01 Techtronic Cordless Gp Charger with battery pack cooling fan

Also Published As

Publication number Publication date
EP1381134A1 (en) 2004-01-14
JP2004039641A (en) 2004-02-05
US20040070368A1 (en) 2004-04-15
JP4629962B2 (en) 2011-02-09
EP1381134B1 (en) 2011-11-16
US6967464B2 (en) 2005-11-22

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